#pragma once

#include <cstdio>
#include <iostream>
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "Comm.hpp"
#define PATH "."
#define FILENAME "fifo"

// 命名管道
class NameFifo
{

public:
    NameFifo(const std::string& path, const std::string& name)
        :_path(path), _name(name)
    {
        _fifoname = _path + "/" + _name;
        umask(0);
        // 新建命名管道
        int n = mkfifo(_fifoname.c_str(), 0666);
        if (n < 0) //返回-1未创建成功
        {
            ERR_EXIT("mkfiifo");
        }
        else //返回0 创建成功
        {
            std::cout << "mkfifo success" << std::endl;
        }
    }

    ~NameFifo()
    {
        // 删除管道文件
        int n = unlink(_fifoname.c_str());
        if (n == 0)
        {
            ERR_EXIT("unlink"); // 这里进程会终止，server可能调不到共享内存的析构
        }
        else
        {
            std::cout << "remove fifo failed" << std::endl;
        }
    }

private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
};

class FileOper
{
public:
    FileOper(const std::string &path, const std::string &name)
        : _path(path), _name(name), _fd(-1)
    {
        _fifoname = _path + "/" + _name;
    }

    void OpenForRead()
    {
        // 打开, write 方没有执行open的时候，read方就要在open内部进行阻塞
        // 直到有人把管道文件打开了，open才会返回！
        _fd = open(_fifoname.c_str(), O_RDONLY);
        if (_fd < 0)
        {
            ERR_EXIT("open");
        }
        std::cout << "open fifo success" << std::endl;
    }

    void OpenForWrite()
    {
        // write
        _fd = open(_fifoname.c_str(), O_WRONLY);
        if (_fd < 0)
        {
            ERR_EXIT("open");
        }
        std::cout << "open fifo success" << std::endl;
    }

    void WakeUp()
    {
        //写入操作
        char c = 'c';
        int n = write(_fd, &c, 1);
        printf("尝试唤醒: %d\n", n);
    }

    bool Wait()
    {
        char c;
        int number = read(_fd, &c, 1);
        if(number > 0)
        {
            printf("醒来: %d\n", number);
            return true;
        }
         return false;
    }

    void Close()
    {
        if(_fd > 0)
         close(_fd);
    }

    ~FileOper()
    {}

private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
    int _fd;
};